Sash-fastener



A. A. WILSON SSH FASTENER.

APPLlcATloN FILED 0cT.4,1919.

1,351,936. Patentedsept. 7,1920.

. y 2M @ZM ANDREW A. ILSON. OF- NORFOLK, VIRGINIA.

sass-rasrnivna.

YSpecification of Letters Patent.

Patented Sept. 7, 1920.

Application led October 4, i919.V Serial No. 328.391.

To all whom t may conci/rn.'

-Be it known that, ANDREW A. l/VrLsoN,

of Norfolk, in the county of Norfolk7 State `be a full, clear, and exact description'of the invention,` such as will enable others skilled inthe art to which it appertains to make and use the same.

My object is to provide a simple and inexpensive device so located as to practically prevent its being tampered wien, and one which allows one sash to be held locked while the other is free to be moved.

1n the drawing Figure 1 is a perspective ection showing the application of my dcvice to a window, while Figs. 2, 3 and 4 are details.

T he window frame is indicated generally at 1 and its inner side at 2. 3 and 4 are, respectively7 the lower and upper sashes, and 5 designates one of the beads mounted in the frame between the grooves in which the sashesV move. The lock is mounted on this bead and is operated by a key 6 projected into an aperture 7 extending into the pulley stile 8 of the frame from its inner edge.

I have shown each of the sashes formed with notches 9 on their opposed faces Vnear their side edges, that is7 at the portions of the sashes which are in contact with the bead 5.

The lock as an entirety consists of a casing 10 having apertured plates 12 by which it may be attached, as by screws, to the inner face of the stile 8, the stile being recessed to receive the plates so that they will lie flush with the surfaces of the sash grooves. The lock is made with a housing projectin(T from each sideof the plates 12. The projection 14 fits Within a countersunk recess 15 formed in the stile and the bead 5 is interrupted to provide a space to receive projection 16 of the housing, this projection being formed in exact correspondence with the bead so as to'form part of it.

Near the upper and lower ends of its side walls projection 16 is formed with openings 17 adapted to register with the notches 9 of of the housing so that itsAV extremities may extend through openings'l'i7 into the notches 9 ofthe two sashes. Imake the upper angulare'xtremity 19 of the lever'lS relatively longer than the lower oneZO. This enables me to hold me lever in such position that the upper sash is locked `while the lower one is free to be moved. A further turn of the lever will lock both sashes and a complete turn in the opposite direction will release both sashes.

The means for actuating the lever 18 is mounted in the projection 14 of the hous ing. 1t consists of a bell crank lever 23 whose fulcrum pin 24 terminates in a square head 25 adapted to register with the aperture '7 in the stile and be received by the key 6. 1n the vertical disposition of the lock when in place the upper arm 26 of the bell crank is longer than the lower arm 27, and both arms are beveled at one side as By the means described the operation of the key and consequent partial rotation of the bell crank 23 will cause the locking lever 18 to shift in aplane at right angles to that of the bell crank. Then the longer arm 26 of the bell crank contacts with the cam 18il on the upper arm of the locking lever, that is, the arm having the longer extremity 19,

the locking lever is capable of being turned farther than when it is acted upon by the short arm 27 of the bell crank contacting with the portion of the cam surface on its lower arm, that is. the arm having the shorter extremity 20. Consequently I am enabled to adjust the key 6 and bell crank 18 so that the upper sash is held locked while the lower sash is free to be moved. A further point of adjustment in one direction locks both sashes and a complete turn in the reverse direction frees both sashes.

Aside from the cheapness of manufacture the main advantage of a structure embodying my invention is that it is virtually burglar proof, there being no way to tamper with thelock as can be done when the lock Y operates in contact with the end edges of the sashes.

I claim as my lnventionz the sashes.

Y Y 1. A sash fastener comprising a substan- 18 is the locking lever. It is of substan Uially S-shaped locking lever having beveled tially S-shape in side elevation with a ca surfaces at each side of its fulcrum, and a surface 1Sa on one side and is fulcrumed atbell crank lever movable in aplane at right about its central portion in the projection lliangles to that of said locking lever and hav- 2' ing its arms beveleclto co-act With the arms of said locking lever, and means for actuating said bell crank lever.

2. A sash fastener comprising a substantially S-shaped locking lever having one of its arms longer than the other vand formed With beveled surfaces at each side of its fulerum, and a -bell crank lever having arms of unequal lengths and movable inV a plane at right anglesfto that of said locking lever,

- saidfbell crankhaving its arms beveledv to c O-act with the arms ofvsaicl locking lever,

and means .for actuating said bell crank 7 '3. ln sashv fastener, the combination Witlra pair of sasheshaving notches on their inner contiguous surfaces, cfa lock com-` prising asubstantially S-shaped lockinglv lever adapted to engage the notches ofboth sashes, a bell crank lever for turning said ing said-lever on its fulcrum.

5. As an article of manufacture, a sash fastener comprising a substantiallyY S- shapecl locking'lever', a bell crank'for shiftingsaid locking lever, ancla key for rotating said bell crank.

In testimony .whereof I have signed this specification.

- `A. A. WILSON. 

